ADC12132 ADC12138 Self-Calibrating 12-Bit Plus Sign Serial Converters with MUX and Sample Hold
ADC12132 ADC12138 Self-Calibrating 12-Bit Plus Sign Serial Converters with MUX and Sample Hold
The ADC12130 ADC12132 and ADC12138 are 12-bit plus sign successive approximation A D converters with serial I O and configurable input multiplexer The ADC12132 and ADC12138 have a 2 and an 8 channel multiplexer respectively The differential multiplexer outputs and A D inputs are available on the A DIN1 and A DIN2 pins The ADC12130 has a two channel multiplexer with the multiplexer outputs and A D inputs internally connected The ADC12130 family is tested with a 5 MHz clock On request these Ds go through a self calibration process that adjusts linearity zero and full-scale errors to typically less than g 1 LSB each The analog inputs can be configured to operate in various combinations of single-ended differential or pseudo-differential modes A fully differential unipolar analog input range a 5V) can be accommodated with a single a 5V supply In the differential modes valid outputs are obtained even when the negative inputs are greater than the positive because of the 12-bit plus sign output data format The serial O is configured to comply with the NSC MICROWIRETM For complementary voltage references see the or LM9140
Features
Serial I O (MICROWIRE SPI and QSPI Compatible) or 8 channel differential or single-ended multiplexer Analog input sample hold function Power down mode Programmable acquisition time Variable digital output word length and format No zero or full scale adjustment required to 5V analog input range with single 5V power supply
Resolution 12-bit plus sign conversion time 12-bit plus sign throughput time Integral linearity error Single supply Power dissipation 3 3V power down 5V power down
12-bit plus sign 8 ms (max) 14 ms (max) g 2 LSB (max) 15 mW (max) 40 mW (typ) 33 mW (max) 100 mW (typ)
Applications
Pen-based computers Digitizers Global positioning systems
TRI-STATE is a registered trademark of National Semiconductor Corporation COPSTM microcontrollers HPCTM and MICROWIRETM are trademarks of National Semiconductor Corporation C1995 National Semiconductor Corporation 12079 RRD-B30M75 Printed S A
16-Pin Dual-In-Line and Wide Body SO Packages 28-Pin Dual-In-Line SSOP and Wide Body SO Packages
Industrial Temperature Range ADC12138CIMSA NS Package Number N16E Dual-In-Line M16B Wide Body SO MSA20 SSOP N28B Dual-In-Line M28B MSA28 SSOP
If Military Aerospace specified devices are required please contact the National Semiconductor Sales Office Distributors for availability and specifications Positive Supply Voltage a ) Voltage at Inputs and Outputs except CH0CH7 and COM Voltage at Analog Inputs CH7 and COM 6 5V
Operating Ratings (Notes 1 2) Operating Temperature Range TMIN TA s TMAX 85 C
Supply Voltage a ) lVA a l VREF a VREFb VREF (VREF a b VREFb) VREF Common Mode Voltage Range (VREF a VREFb) DIN2 MUXOUT1 and MUXOUT2 Voltage Range D IN Common Mode Voltage Range (VIN a VINb) 2
Input Current at Any Pin (Note 3) Package Input Current (Note 3) Package Dissipation 25 C (Note 4) ESD Susceptability (Note 5) Human Body Model Soldering Information N Packages (10 seconds) SO Package (Note 6) Vapor Phase (60 seconds) Infrared (15 seconds) Storage Temperature
The following specifications apply for a 5V VREF 096V and fully differential input with fixed 2 048V common-mode voltage) 3 3V VREF 2 5V and fully-differential input with fixed 1 250V common-mode voltage) VREFb 12-bit a sign conversion mode source impedance for analog inputs VREFb and VREF s 25X fCK e fSK e 5 MHz and 10 (tCK) acquisition time unless otherwise specified Boldfade limits apply for TJ e TMIN to TMAX all other limits 25 C (Notes 7 8 and 9) Symbol Parameter Conditions Typical (Note 10) Limits (Note 11) Units (Limits)
12 a sign After Auto-Cal (Notes 12 18) After Auto-Cal (Notes 12 18) After Auto-Cal After Auto-Cal (Notes 12 18) After Auto-Cal (Notes 12 18) After Auto-Cal (Notes 5 18) VIN( ) e VIN (b) 2 048V After Auto-Cal (Note 15) After Auto-Cal (Notes 12 13 and 14)
Bits (min) LSB (max) LSB (max) LSB (max) LSB (max) LSB (max) LSB (max) LSB (max) LSB
Positive Integral Linearity Error Negative Integral Linearity Error Differential Non-Linearity Positive Full-Scale Error Negative Full-Scale Error Offset Error DC Common Mode Error
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